High-resolution face photographs may also contain unexpected information about the environment of the photographic subject, including the appearance of the immediate surroundings, Jenkins explained to KurzweilAI.

“In the context of criminal investigations, this could be used to piece together networks of associates, or to link individuals to particular locations. This may be especially important when for categories of crime in which perpetrators photograph their victims. Reflections in the victims eyes could reveal the identity of the photographer.